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Acetylene torch questions
stampitall -
Sunday, September 28, 2008 - 5:37pm
Jewelry Hi all, I have been plugging away in my garage today making ingots to use in my class rolling mill. Today I was running the torch for awhile and the pressure seems to still be fairly high, but the torch sputtered and started dripping liquid acetylene (at least that's what I think it is...lol) I've shut off the valves and stopped using the torch. My question is, why would the torch start to do that? Is there a minimum pressure that you have to have for the torch to work? (I think I read 75psi min, but it seems to still be at 200psi)... Does the gas go bad after awhile? The tank hasn't been used in about 8 months. Do I just need to let the tank sit for awhile to let the gas expand again? The valves seemed cold to the touch, so I'm wondering if it's like my mapp gas torches that stop functioning when they get cold... Any help would be appreciated.  STOP USING THAT TORCH AND
Rich Waugh -
Sunday, September 28, 2008 - 9:01pm
STOP USING THAT TORCH AND CYLINDER! It sounds like you may be drawing off the acetone that the acetylene is dissolved in, and that can both damage your torch and cause an explosion. Shut off the cylinder, disconnect the regulator, and take everything to your gas/welding supplier and have it all checked out. REPEAT - STOP USING THAT EQUIPMENT! » reply  Sounds like the acty
wagin -
Monday, September 29, 2008 - 3:58am
Sounds like the acty cylinder was stored horizontal. If this is the case, placing the cylinder up-right for a day or so should correct the problem. Otherwise, I would return the cylinder to your gas supplier. » reply acetone bleed off
visitor -
Sunday, October 5, 2008 - 4:54pm
what is happening is that you are using gas faster than it can evaporate from the acetone. This happens when you use 1, a tank thats too small, 2 a tip thats too bigg,or 3 running too long at too high a flow rate. The solution is get a bigger tank, switch to mapp or propane gas, or manifold several tanks together. I have only rarely actualy seen this happen, but I use large tips on my torch, almost never run it for very long and when i do i manifold three tanks together and switch to liquid oxygen. Yes that is the next problem you'll run into ! The only time i have had that I have run into this was in cutting anvils and hammer dies from 4" 4140 plate! I have heard of the problem when using a large rosebud though. » reply This is the right answer
visitor -
Tuesday, September 22, 2009 - 2:57pm
1/7 of tank/hr from what I've read. » reply |
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ArtMetal
I have had a Presto Lite
I have had a Presto Lite air/acetylene torch for more than twenty years and never had this happen. Are you using oxygen with the acetylene .? Has the tank been kept vertical?
marilyn